#nav-bar {
    margin-top: -3px !important;
    margin-bottom: -4px !important;
}

.tabbrowser-arrowscrollbox {
    max-height:24px !important;
}

.tabbrowser-tab {
    margin-bottom: 4px !important;
}

.tabs-bottom {
    margin-bottom: -3px !important;
    border: 0 none !important;
}